imx: mx6ull: fix REFTOP_VBGADJ setting

The previous code wrote the contents of the fuse as is in the
REFTOP_VBGADJ[2:0], but this was wrong if you consider the contents of
the table in the code comment. This table is also different from the
table in the commit description. But then, which of the two is correct?
If it is assumed that an unprogrammed fuse has a value of 0 then for
backward compatibility of the code REFTOP_VBGADJ[2:0] must be set to
6 (b'110). Therefore, the table in the code comment can be considered
correct as well as this patch.

Fixes: 97c16dc8bf098 ("imx: mx6ull: update the REFTOP_VBGADJ setting")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

diff --git a/arch/arm/mach-imx/mx6/soc.c b/arch/arm/mach-imx/mx6/soc.c
index a353bffddf78e91182839d4b6ac038a30de2196c..03d6b8c1ce9d80c5d2312652dda3da72602ac05f 100644 (file)
--- a/arch/arm/mach-imx/mx6/soc.c
+++ b/arch/arm/mach-imx/mx6/soc.c
@@ -366,11 +366,13 @@ static void init_bandgap(void)
         *      111 - set REFTOP_VBGADJ[2:0] to 3b'111,
         */
        if (is_mx6ull()) {
+               static const u32 map[] = {6, 1, 2, 3, 4, 5, 0, 7};
+
                val = readl(&fuse->mem0);
                val >>= OCOTP_MEM0_REFTOP_TRIM_SHIFT;
                val &= 0x7;
 
-               writel(val << BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ_SHIFT,
+               writel(map[val] << BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ_SHIFT,
                       &anatop->ana_misc0_set);
        }
 }